HIGHLIGHTS

"Plasmonic Octahedral Gold Nanoparticles of Maximized Near Electromagnetic Fields for Enhancing Catalytic Hole Transfer in Solar Water Splitting", Particle & Particle Systems Characterization 34, 1600340 (2017)

"Dominance of Plasmonic Resonant Energy Transfer over Direct Electron Transfer in Substantially Enhanced Water Oxidation Activity of BiVO4 by Shape-Controlled Au Nanoparticles", Small 13, 1701644 (2017)

(Summary)

In the situation in which, localized surface plasmon resonance of Au nanoparticle does not overlap above the absorption edge of semiconductor (TiO2), plasmon-enhanced solar water splitting is efficient when edges of nanoparticle converge into sharp vertices with moderate nanoparticle number coverage. Catalytic hole transfer from intraband-transition (hot-hole injection) is involved in the enhancement. Conversely, when localized surface plasmon resonance of Au nanoparticle overlaps above the absorption edge of semiconductor (BiVO4), plasmon-enhanced solar water splitting is efficient when edges of nanoparticle converge into sharp vertices with moderate nanoparticle number coverage. DET (interband-transition) and PRET mechanisms are involved in the enhancement.

“Enhancing the plasmonic component of photonic-plasmonic resonances in a self-assembled dielectric sphere array on Ag”, Journal of Materials Chemistry C 9, 1764-1771 (2021)

(Summary)

A modified self-assembly method at an air-liquid interface was developed to prepare a large-scale homogeneous array of polystyrene (PS) spheres on Ag supporting photonic–plasmonic hybrid resonances in the visible range. A thin Ag coating and TiO2 film were introduced above and below the array, respectively, leading to 6-fold stronger near-field intensity compared to the structures without designs without the two structural additions.

“Chemically-responsive structural colors from polaronic P3HT films”, ACS Applied Materials & Interfaces 13, 1555-1561 (2021)

(Summary)

The charge modulation of conjugated polymers is demonstrated as a new mechanism for chemically responsive structural colors based on thin-film interference. It experiences drastic changes in its dielectric behavior upon switching of the polaronic state, thereby enabling large modulations to the interferometric colors. Such responsive thin-film colors were adopted as a simple and intuitive multicolor readout.

“Active electrochemical high-contrast gratings as on/off switchable and color tunable pixels”, Nature Communications 13, 3391 (2022)

(Summary)

This work describes the first success in the world for two key display operations ([1]-color tuning and [2]-on/off switching) in one reflective structural color system. The pixels are achieved by changing the modal interference conditions and absorption via electrochemical control of Cu occupancy inside dielectric grating slits. An active color-switching display and individually addressable on/off pixel matrix were also demonstrated for practical display applications.

“Origin of High Optical Contrast in Zinc-Zinc Oxide Electrodeposits for Dynamic Windows”, Nano Energy 114 108666 (2023)

(Summary)

Herein, we firstly achieved the transmission of metal-electrodeposit system lower than what is predicted for a ideal perfectly uniform thin film from Zn. That indicates efficient tinting is possible from a same amount of charge compared to the other metal-based systems. Spectroelectrochemical investigation demonstrate that this caused by their unique nanostructures. Finite-difference time-domain (FDTD) simulations suggest, which arises from plasmonic effects among the Zn nanoparticles and ZnO dendrites in the film.